I honestly had thought that this card would be overpowered as a matter of fact.
Consider this, if you have, say an unupgraded Kite on the field and you play Thunderstorm, targeting an entire field of Malignant Cells, they don't die, however you may pay 1 to deal 78 damage.
Hrm... so, something like a death/air/aether trio, with wings, afla, this, and some thunderstorms, with some other stuff (maybe nova+reflective?) Afla an opponent's creature, then wait behind wings for the field to fill up, then storm-storm-release? That sounds like a rather complicated set-up, and would give air, death, and aether an equivalent of the firestall... but would fail hard against immortal or creatureless decks- like the aforementioned firestall, or an UG stall/rush/whatever it's called. As for cost... assuming unupped, that's 8
, 12
(one kite, two storms, one wings), 1
, and 6 turns, minimum (assuming you get 4
and 8
on your first turn, and your opponent got a creature out on their first/second turn, then plays another that can be targeted) Against gods, though... three storms on a full field could be a OTK... assuming they haven't killed you by then.
If you're so worried about strength, then have diminishing returns, counter-wise, on thunderstorm. However, I think it's so easily countered, and takes such a long time along with the complexity, that it shouldn't be too bad- five UG give a OTK for 30
, 5
, and 5 cards; this can give a OTK for no less than 8
, 8
, 1
, and 4 cards, but your opponent has to have at least 17 unprotected creatures out, and had to have at least 1 unprotected creature out to allow you to aflatoxin one in the first place. No offence, but I'd go with the gases- they, at least, are assured damage, even if they're stopped cold by reflective shields. (plus, 6 gases in a deck allows for much more freedom than 3 kites, 3 afla, and 6 storms, which is what I'd pack, minimum, for kite)
Also, what would happen if you had two kites on the field? Would it be captured if one tried to release? Or would they be able to release through each other (though two kites + one storm would be more expensive than one kite + two storms)